Think we're the only ones with the advanced tools to tamper with photos. Think again as this craft actually extends back to the early days of photography.
Image forensics website FourAndSix has an entire section dedicated to photo tampering throughout history. Believe it or not, some of our most iconic photographs from the 1800s are actually composites.
This looks like General Ulysses S. Grant in front of his troops at City Point, Virginia, during the Civil War, but it's actually a composite of three different pictures. The head is from Grant, the horse and body are from Major General Alexander M. McCook and the background is a bunch of Confederate prisoners.
Joseph Goebbels must have fallen out of Hitler's favour as the Nazi propagandist is removed from the image on the left.
This isn't Abraham Lincoln. It's Lincoln's head on top of Southern politician John Calhoun's body.
Benito Mussolini may have been a tough guy on his horse. What you don't see in the final picture is the horse handler who was helping control the horse in the original photo.